5.0.1-release-notes

[hmottestad]

Javadocs, release-notes and news item for 5.0.1

• [x] check that jenkins finished publishing the release
• [ ] remember to also add the release here on GitHub (include announcement)

[hmottestad]

Double check that the release went through: https://ci.eclipse.org/rdf4j/job/rdf4j-deploy-release-ossrh/

[hmottestad]

@barthanssens Do you want to put a sentence or two in here about the security vulnerabilities that you've fixed by bumping dependencies?

[barthanssens]

@barthanssens Do you want to put a sentence or two in here about the security vulnerabilities that you've fixed by bumping dependencies?

Good idea, I'll update the notes